211331051 has 2 divisors, whose sum is σ = 211331052. Its totient is φ = 211331050.

The previous prime is 211331011. The next prime is 211331069. The reversal of 211331051 is 150133112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211331051 - 2²⁶ = 144222187 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (211331011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105665525 + 105665526.

It is an arithmetic number, because the mean of its divisors is an integer number (105665526).

Almost surely, 2^211331051 is an apocalyptic number.

211331051 is a deficient number, since it is larger than the sum of its proper divisors (1).

211331051 is an equidigital number, since it uses as much as digits as its factorization.

211331051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 211331051 is about 14537.2298255204. The cubic root of 211331051 is about 595.6453708753.

Adding to 211331051 its reverse (150133112), we get a palindrome (361464163).

The spelling of 211331051 in words is "two hundred eleven million, three hundred thirty-one thousand, fifty-one".